_ registry / mcp streamable-http · checked 1h ago

doubletaxation

https://doubletaxation.app

Registry code: 6466ae5fecc1724c

api record

DoubleTaxation (doubletaxation.app) determines an individual's tax residence between two countries and explains where and which taxes apply, with the legal basis: domestic law of both states, the tax treaty tie-breaker (Art. 4), court practice, and the treaty's special rules per type of income. It also shows the tax burden on salaries (OECD Taxing Wages method).

How to use:

endpoint
https://doubletaxation.app/api/mcp
protocol
streamable-http ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is doubletaxation live?
Yes — it answered the hub's last check (checked 1h ago). It answered 100% of checks over the last 30 days.
Is doubletaxation free to use?
Yes — the hub reached it with no key and no payment.
What tools does doubletaxation have?
4 tools: list_countries, check_residency, list_versions, tax_burden.
Is doubletaxation safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
100%

90 days 100%· all time 100%

latency
580ms

last good check

priced tools
0

of 4 tools

_ answered our checks, 90 days 1 checks · signed record
  • unknown → live
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 4 tools
2 open 2 never probed 2 of 4 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • list_versions open 1h ago

    Lists the 12 versions of DoubleTaxation. Each version is written for taxpayers of one home state (in its language) and compares it with 20 other countries. Call this first if you are not sure which version fits the user.

    mcp-tool

    {
  "type": "object",
  "properties": {},
  "additionalProperties": false
}
    arguments 5 lines
  • tax_burden open 1h ago

    Income tax and social contributions on an annual salary in one or more countries (OECD Taxing Wages method: single person, no children, full-year employee). Returns net pay, personal rate, tax wedge and marginal rate, sorted from lowest to highest personal rate. For up to 3 countries also the line-by-line breakdown, special tax regimes for individuals (e.g. for newcomers), assumptions and official sources.

    mcp-tool

    {
  "type": "object",
  "properties": {
    "version": {
      "enum": [
        "uk",
        "en",
        "pl",
        "cs",
        "ro",
        "hu",
        "tr",
        "zh",
        "in",
        "ja",
        "bn",
        "pk"
      ],
      "type": "string",
      "description": "Language of the texts (version id). Default: en."
    },
    "countries": {
      "type": "array",
      "items": {
        "enum": [
          "AT",
          "BD",
          "CA",
          "CH",
          "CN",
          "CZ",
          "DE",
          "ES",
          "FR",
          "GB",
          "HU",
          "IN",
          "IT",
          "JP",
          "NL",
          "PK",
          "PL",
          "RO",
          "TR",
          "UA",
          "US"
        ],
        "type": "string"
      },
      "description": "ISO codes; default: all available countries."
    },
    "gross_eur": {
      "type": "number",
      "description": "Annual gross salary in EUR. Default 60,000 (reference profiles: 30,000 / 60,000 / 120,000)."
    },
    "gross_local": {
      "type": "number",
      "description": "Annual gross salary in the country's own currency (only with exactly one country)."
    }
  },
  "additionalProperties": false
}
    arguments 62 lines
  • list_countries unknown never probed

    Lists the countries that can be checked against the home state of a version: whether a tax treaty is in force (title, dates, link), whether per-income treaty rules and tax burden data exist, plus the allowed citizenship options and years for check_residency.

    mcp-tool

    {
  "type": "object",
  "required": [
    "version"
  ],
  "properties": {
    "version": {
      "enum": [
        "uk",
        "en",
        "pl",
        "cs",
        "ro",
        "hu",
        "tr",
        "zh",
        "in",
        "ja",
        "bn",
        "pk"
      ],
      "type": "string",
      "description": "Version id from list_versions."
    }
  },
  "additionalProperties": false
}
    arguments 27 lines
  • check_residency unknown 1h ago

    Determines the person's tax residence between the version's home state and another country, step by step. Without all answers it returns status "needs_answer" and the next question (id, text, options); ask the user and call again with all answers collected so far. When complete it returns status "done": the conclusion with reliability %, how each law treats the person, the treaty tie-breaker, where and which taxes apply, the legal basis (norms with links) and court practice, optional per-income-type rules, the disclaimer and a link to the same result on doubletaxation.app. Texts are in the language of the version.

    mcp-tool

    {
  "type": "object",
  "required": [
    "version",
    "country"
  ],
  "properties": {
    "year": {
      "type": "integer",
      "description": "Tax year: the current year or one of the two previous years. Default: current year."
    },
    "income": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "category",
          "source"
        ],
        "properties": {
          "days": {
            "type": "integer",
            "description": "employment: days in the state of work within the treaty period."
          },
          "asset": {
            "enum": [
              "immovable",
              "property_rich_shares",
              "other"
            ],
            "type": "string",
            "description": "capital_gains: what is sold."
          },
          "amount": {
            "type": "number",
            "description": "Optional annual gross amount (any currency, used for an illustrative calculation)."
          },
          "source": {
            "type": "string",
            "description": "ISO code of the state of source: where the work is done, the property is, the payer or company is resident, the performance takes place. Must be the home state or the other country."
          },
          "student": {
            "enum": [
              "yes",
              "no",
              "unknown"
            ],
            "type": "string",
            "description": "students: came to the state of study for education, and the payments come from abroad?"
          },
          "category": {
            "enum": [
              "employment",
              "business",
              "technical_fees",
              "government",
              "pension",
              "immovable",
              "dividends",
              "interest",
              "royalties",
              "capital_gains",
              "directors",
              "artistes",
              "students",
              "other"
            ],
            "type": "string"
          },
          "borne_by_pe": {
            "enum": [
              "yes",
              "no",
              "unknown"
            ],
            "type": "string",
            "description": "employment: is the salary borne by a permanent establishment of the employer in the state of work?"
          },
          "fixed_place": {
            "enum": [
              "yes",
              "no",
              "unknown"
            ],
            "type": "string",
            "description": "business / technical_fees: fixed place of business (permanent establishment) in the state of source?"
          },
          "study_state": {
            "type": "string",
            "description": "students: state where the person studies (ISO code)."
          },
          "pension_kind": {
            "enum": [
              "social",
              "government",
              "private"
            ],
            "type": "string",
            "description": "pension: state social pension, pension for government service, or private/occupational pension."
          },
          "service_days": {
            "type": "integer",
            "description": "business / technical_fees: days of providing services in the state of source."
          },
          "service_state": {
            "type": "string",
            "description": "government: state where the government service is performed (ISO code)."
          },
          "employer_resident_of_source": {
            "enum": [
              "yes",
              "no",
              "unknown"
            ],
            "type": "string",
            "description": "employment: is the employer resident in the state of work?"
          }
        },
        "additionalProperties": false
      },
      "description": "Optional: the person's income, one item per category, to get the treaty's special rules (who may tax it, rate limits, relief method, example calculation if amount is given)."
    },
    "answers": {
      "type": "object",
      "description": "Answers so far: { \"<question id>\": value }. Choice questions take an option value (e.g. \"yes\", \"no\", \"unknown\"); number questions take a whole number (days) or \"unknown\" if allowed.",
      "additionalProperties": {
        "type": [
          "string",
          "integer"
        ]
      }
    },
    "country": {
      "enum": [
        "AT",
        "BD",
        "CA",
        "CH",
        "CN",
        "CZ",
        "DE",
        "ES",
        "FR",
        "GB",
        "HU",
        "IN",
        "IT",
        "JP",
        "NL",
        "PK",
        "PL",
        "RO",
        "TR",
        "UA",
        "US"
      ],
      "type": "string",
      "description": "ISO code of the other country (where the person lives or stays). Must be one of list_countries for this version."
    },
    "version": {
      "enum": [
        "uk",
        "en",
        "pl",
        "cs",
        "ro",
        "hu",
        "tr",
        "zh",
        "in",
        "ja",
        "bn",
        "pk"
      ],
      "type": "string",
      "description": "Version id (home state), see list_versions."
    },
    "citizenship": {
      "type": "string",
      "description": "Citizenship option value from list_countries.citizenship_options, e.g. \"UA\", \"UA+OTHER\" (dual), \"NONUS\". Default: the first option (citizen of the home state only)."
    }
  },
  "additionalProperties": false
}
    arguments 184 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

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_ how we know
card completeness
80%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

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_ record

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proxied calls
total
0
ok
0
failed
0
success rate
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median latency
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work
attempts
0
accepted
0
rejected
0
acceptance rate
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settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.